Lens-holding lock for reflectors



Nov. 18, 1930. R. E. MAJOR 1,731,729

LENS HOLDING LOCK FOR REFLECTORS Filed Feb. 6, 1930 2 Sheets-Sheet l Nov. 18, 1930. R. E. MAJOR 1,781,729

' LENS HOLDING LOOK FOR REFLBCTORS Filed Feb. 6. 1930 2 Sheets-sheet 2 a 7 i I ffiz/evzzaz {56272355 J0 1 505606 5 #307: M 21%. 1a a Zr 5 Patented Nov. 18, 1930 ROSCOE .E. MAJOR, or CHICAGO, ILLINOIS, Assrenon "To Macon shimm r: co, Inc;

A CORPORATION'OF-ILLINOIS' 1 LENS-HOLDING LooK son REFLECTORS Application filed February 6 19a. s ria1,ito. 42t,29s..,-

This invention relates to improved means for retaining the glass'lenses of ceiling flood lights in position on the frame or reflector part of the lamp holder.- Y

The purpose of the invention is'to provide a safe and easily manipulated clamp for the lens. Many appliances noW in use for supporting the lenses of fioodlights are not safe, because of variability of adjustment resulting, in the uncertainty as to being inthe fully on or on clamping positions, and lack of capacity for easy manipulation. It is therefore an object of this invention to pro vide lens latching means or clips which, by the pressure of a finger in one direction, may be moved out of engagement with the lens ring, retained in such position, and by a mere touch will spring back into the full latching position.

The purposes of the invention are accomplished by the latch construction illustrated in the accompanying drawings,,wherein:

Figure 1 is a bottom plan view of the ceiling lamp holder, including the lens and latches shown in retaining position.

Figure 2 is a sectional view taken on the line 2 2of Figure 1.

Fig. 3 is a fragmentary bottom plan view, showing one of the latches retained disengaged from the lens ring.

Fig. 4 is a side view of oneof the latches showingthe lens and associateparts of the lamp holder in, section as taken on the line 44: of Fig. 1.

Fig.- 5.is a side view of the latch in its disengaging position, with-a fragment of the re flector and lamp holder in section, and with the lens removed.

Fig. 6 is a perspective View of the latch as it would appear when turned upside down.

Fig. 7 is a perspective detail of the movable clip part of the latch as it appears in Figure 6. i

Fig. Sis a longitudinal sectional view of the latch. v i

Fig. 9 is a transverse sectional View of the latch taken on the line 9-9 of F ig; 8.

Fig. 10 is another longitudinal section for the purpose of illustrating the position of p The part 3 of the structure the clip part the latch as it appears when. retained in its disengaging position;

In ordrto provide a safe construction for the purpose of retainingceiling,fioodli-ght lensesin position onlamp housing is provided which, 'wh' n slid to disengaging position, is automatically retained. in such position, and will, by a mere touch of afiiiger,

spring back'to latching position- This easy operation causing the latches to spring from the disengaging position tothe engaging position without any other manipulation than a mere touch, is of particular utility under circumstances of difiicult accessibility generally the case in regard to ceiling fioo'dliglitsi Iti'sconveiiient to. one changing alaliip bulb orcleaning the light, since the lens may be held in positionby one hand, jwhile nothing but mere to'u'che's from the other liaiitl are required to fully set the retaining clips. The lensesare same times rather heavy and large, and it is decidedlyfinconv'enient to manipulate screws oiito hold latcheslin releasing position while the lens is placed in its proper position. Q Each latch comprises thestampings 1, 2, 3 and a coilspring l. The stampings land 3 are secured together and constitutea fixed rigid frame structure within which isslidably mounted the lens clip, part 2.; 9

extending lug .5, which is punched and pressedoutwardly from part 2, leaving the recess 6 in the latter. I

barrel and is clipped rigidly to the member '2 by bent :lugsf which arestruck from part 3- andpassed through slots in part 1. 1 Thespring barrel 8 is provided with an integral: end portion' 8, against which one end ofthefspring bears, and the edge 9 of the end dpart ofthe spring barrelserves as a guide and fulcrum forilatch slide :2. V The slide 2'is' also recessed at 10 at ea'ch side for receiving guide flanges 11,- bent inwardly from part 1: The flanges 11' are limited in length according to the desired stroke of s, a latch isv a spring -shows how the parts 1 and I3. are bent to form'a guidewayaforjthe slide or clip" 2. The spring 4 bears against the upwardly the clip 2, and are cut away at their ends,

as indicated at 12, Fig. 6.

ing the clip in its unlatching position when the latch is shifted perpendicularly to 1ts longitudinal movement.

Signed at Chicago this third day of Feb.,

ROSCOE E. MAJOR.

of spring 4,'which forms a couple with the I fulcrum 9. The clip is retained in disengaged position because it bears against the end flanges 11 at recesses 12. In order to cause the clip tomove into the lens retaming position, it is merely necessary to press against its end 13, and thereby disengage it from the ends of flanges 11, and permit it to move to latching position under the action of spring 4. I claimyz" i 1. Lens latching means comprising a fixed frame of two parts bent-and secured together to form a longitudinally extending guideway for a slidable latching clip, a

latchingclip movably mounted in the guide way and provided with a lug projecting .to one side of the guideway, a spring bearing between said lug and a portion of said frame structure at one side of said guideway, said frame structure beingfformed to provide a fulcrum forthe clip around which the clip may move perpendicularly to its longitudinal movement, said spring and fulcrum forming a couple, and means preventing the perpendicular movement of the clip except a at one point of its longitudinal stroke. a V

2. Lens latching means comprising a twopart frame structure, one of said parts heing'bent toprovide attaching flanges and the other part being bent to form a spring barrel, the two parts of said frame structure also being formed to provide a guide- .way, a latching clip slidably mountedin said guideway, a spring in ,the spring bar,-

rel bearing against one end of the barrel and said sliding clip, guide flangeson said framestructure', andrecesses intheclip for engaging said: guide flanges, said guide flanges being cut away atone end to allow the clip to move perpendicularly of its 'normal longitudinal stroke and be'retained in such position by bearing against thelends of said guide flanges under the action of said'spring. V

3; Lens latching means comprising a fixed frame structure arranged to form a slideway for alatch clip, a latch clip slidably mounted in said guideway for longitudinal motion, a spring between said'frame structure and latch clip for urging the clip to move into its latching position, said spring being positioned to rock the latch clip perpendicularly to its longitudinal movement when the latch clip is in the unlatching position, and means on the frame for retain- 

